The harmonic mean of 1, 2, and 4 is: MCQ with Answer and Explanation

Question

Share Report Error

The harmonic mean of 1, 2, and 4 is:

A. 12/7

B. 3/7

C. 7/12

D. 7/3

Answer: Option A

Solution (By JKSSB Mock Tests)

HM = 3 / (1 + 1/2 + 1/4) = 3 / 1.75 = 12/7.

This question belongs to: Accountancy and Statistics Statistics

Request complete Subject PDF

Discuss this Question (0)

No comments yet. Be the first to start the discussion!

Practice More Statistics Questions

Question #1

The horizontal axis of a histogram represents:

A. Class boundaries

B. Cumulative frequencies

C. Frequencies

D. Class marks

View Answer & Solution Discuss

Get Complete Subject PDF for Accountancy and Statistics

Correct Answer: Option A

Explanation:
In a histogram, the x-axis shows the continuous class boundaries (or limits).

This question belongs to: Accountancy and Statistics Statistics

Question #2

In a distribution, the mode is 30, median 32, mean 34. The distribution is:

A. Symmetric

B. Positively skewed

C. Leptokurtic

D. Negatively skewed

View Answer & Solution Discuss

Get Complete Subject PDF for Accountancy and Statistics

Correct Answer: Option B

Explanation:
Mean > Median > Mode indicates positive skewness.

This question belongs to: Accountancy and Statistics Statistics

Question #3

A population pyramid with a narrow base and wide top indicates:

A. High infant mortality

B. High fertility, low mortality

C. High birth rate, high death rate

D. Low birth rate, low death rate, aging population

View Answer & Solution Discuss

Get Complete Subject PDF for Accountancy and Statistics

Correct Answer: Option D

Explanation:
Narrow base means fewer young people; wide top means many elderly, typical of developed countries.

This question belongs to: Accountancy and Statistics Statistics

Explore All Statistics MCQs